Xamarin.Forms - Enable Default Zooming in Webview

In this blog post, you will learn how to enable webview default zooming in xamarin forms.

Introduction

 

Xamarin.Forms code runs on multiple platforms, each of which has its own filesystem. This means that reading and writing files are most easily done using the native file APIs on each platform. Alternatively, embedded resources are a simpler solution to distribute data files with an app.

Prerequisites

• Visual Studio 2017 or later (Windows or Mac)

Setting up a Xamarin.Forms Project

 

Start by creating a new Xamarin.Forms project. You will learn more by going through the steps yourself.

 

Create a new or existing Xamarin forms (.Net standard) Project with Android and iOS Platform.

Choose the Mobile App (Xamarin. forms) project under C# and Mobile.

 

Name your app. You probably want your project and solution to use the same name as your app. Put it on your preferred location for projects and click "Create".

 

Now, select the blank app and target platforms - Android, iOS, and Windows (UWP).

 

Subsequently, go to the solution. In there, you get all the files and sources of your project (.NET Standard). Now, select the XAML page and double-click to open the MainPage.Xaml page.

 

You now have a basic Xamarin.Forms app. Click the Play button to try it out.

Create a Custom Webview

Here going to create a custom webview inherit from webview for custom rendering to enable zooming.

CustomWebView.cs

Android Implementation

 

There are two ways in android.

1. Use Platform Specific code.

Following code snippets enable the default zooming in webview.

MyWebView.xaml.cs

2. Custom Renderer

Here, Create a custom renderer for enabling zooming in android.

CustomWebViewRenderer.cs

iOS Implementation

 

Here, Create a custom renderer for enabling the webview default zooming in iOS.

 

CustomWebViewRenderer.cs

Consuming the CustomWebview

 

Here, consume the Custom Webview in your xaml

Add Namespace

Add your Custom Webview

MyWebPage.xaml

MyWebPage.xaml.cs

Click the "Play" button to try it out

Android 

You can test zoom by emulator also use Shift + ctrl + Left click and mouse move

iOS 

Simulator also support zoom use Alt + Left click and mouse move

Wow, It's working.😍

 

I hope you have understood how to enable webview default zooming in Xamarin.Forms.

 

Thanks for reading. Please share your comments and feedback.

Happy Coding 🙌